Audit some Mac TODOs.

chrome/browser/chrome_browser_application_mac.mm

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/chrome_browser_application_mac.h"
 
 #import "base/logging.h"
 #import "base/metrics/histogram.h"
 #import "base/scoped_nsobject.h"
 #import "base/sys_string_conversions.h"
@@ skipping 170 matching lines @@
   return YES;
 }
 
 }  // namespace
 
 @implementation BrowserCrApplication
 
 + (void)initialize {
   // Turn all deallocated Objective-C objects into zombies, keeping
   // the most recent 10,000 of them on the treadmill.
-  // TODO(shess): Convert to a DCHECK() before the next beta channel.
-  // http://crbug.com/45676
   ObjcEvilDoers::ZombieEnable(YES, 10000);
 }
 
 - init {
   CHECK(SwizzleNSExceptionInit());
   return [super init];
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // HISTORICAL COMMENT (by viettrungluu, from
@@ skipping 160 matching lines @@
       SetCrashKeyValue(kLastExceptionKey, value);
     }
 
     reportingException = NO;
   }
 
   [super reportException:anException];
 }
 
 @end